Their specifications include m3, M4, M5, M6, M8, M10 and so on
Hexagon nuts are divided into type I, type II and thin type according to the nominal thickness. Nuts above grade 8 are divided into type 1 and type II. Type I hexagon nuts are the most widely used. Type 1 nuts are divided into three grades A, B and C. grade A and B nuts are suitable for machines, equipment and structures with small surface roughness and high precision requirements, while grade C nuts are used for machines, equipment or structures with rough surface and low precision requirements; The thickness of type 2 hexagon nut is relatively thick, which is often used in occasions where assembly and disassembly are often required.
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